Libav is a fork of the popular FFmpeg multimedia tool, best known for appearing in the Ubuntu packages. Include the full, uncut console output when asking for help with a command.
Questions tagged [libav]
145 questions
6
votes
0 answers
Non monotonically increasing dts to muxer in stream 1
I have an error with 1gb videofile and avconv
Application provided invalid, non monotonically increasing
dts to muxer in stream 1: 177873 >= 177849
av_interleaved_write_frame(): Invalid argument
I use
avconv -i /root/video/112-1.wmv -y -strict…
Alex
- 173
5
votes
1 answer
avconv can't convert stream to MP4 file, fails with "Unable to set encoding parameters"
I'm trying to script some testing of Wowza Media Server. Basically, I'm attempting to just beat the living bejeepers out of the thing. I have 5 slightly older computers, originally XP boxes, which I have installed Mint 15 on. I have a script that…
mikecole79
- 61
2
votes
2 answers
Reducing video size with avconv... why does the size increase?
i have an android video:
$ mediainfo 20140324_192544.mp4
General
Complete name : 20140324_192544.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID …
csnemes
- 21
1
vote
1 answer
Concatenate .mp4 videos of different encoding parameters using avconv without losing quality?
How can I use the avconv tool to concatenate multiple .mp4 videos of different encoding parameters in a single container, without losing quality?
a06e
- 667
1
vote
0 answers
Piping images to avconv at unknown fps
I am currently reading images from a camera "as fast as possible" (>50fps), outputting them as JPEGs, and piping them to avconv using the image2pipe input. What is a good approach to getting the output stream to be as "real time" as possible? Do I…
Nick Spacek
- 111
1
vote
1 answer
How to use avconv filters after encoding?
I have this avconv command:
avconv -i file -s [new size options] -vf "[filters]" /root/converted/1.mp4
Avconv uses the -vf filters before the -s scaling, but I need one avconv command to:
Resize video first
Use filters second
How can I do it?
Alex
- 173
1
vote
0 answers
libav - readability of text from high resolution to low viewing resolution
Scenario: Trying to create a screencast of a linux system for a tutorial.. The two monitors I have are a combined (3400x1200).. When I play it back on a windows machine, either using VLC or Windows Media Player on a 1920x1020 screen, the terminal…
RUERRIC
- 11
1
vote
0 answers
Cropping with avconv
I am trying to crop a video with avconv
avconv -r 25 -i test.avi -vf "crop=out_w=in_w" -b 1024k test2.avi
but avconv tells me
Invalid chars '=in_w' at the end of expression 'out_w=in_w'
whatever things I do it seems it can not understand stuff…
Fabio
- 111
0
votes
1 answer
How can I make the output format of a video the same as the input format?
How can I make the output format of a video the same as the input format for general case?
avconv -i source -vcodec copy -acodec copy -movflags empty_moov -f ??? output
I would not like to use -f with a specific value and how to prevent avconv from…
Aftershock
- 685
0
votes
1 answer
How do I merge two videos and increase sound volume using Avconv?
I'm trying to merge two cd-s into 1 file and also boost sound volume 200%, I tried this using avconv tool, but I only got cd1 and without an boost in sound:
nohup avconv -i cd1.avi -i cd2.avi -vcodec libx264 -acodec libvo_aacenc -r 30000/1001 -vol…
user98645
0
votes
1 answer
Conversion of non numbered images to video with avconv
I have many pictures which I want to make a movie from. The problem is that they don't follow a regular numeric order. They came from my smartphone camera, but some were captured in the same second, so their names are (for…
Rodrigo
- 171
0
votes
1 answer
hot reload overlay with avconv
I use avconv to encode a rtmp stream.
I have a PNG overlay over the video.
I would like to, each time the png picture is updated, the overlay is updated to.
Si I try to add:
-f image2 -loop 1 -i /score.png
but I still have to restart the stream to…
Paul
- 101
0
votes
1 answer
avconv equivalent to Ffmpeg's scale2ref?
Using a filter_complex in ffmpeg with '[1][0]scale2ref[i][m];[m][i]overlay[v]', where I'm overlaying a png on top of a video and scaling down to the size of the video. Is there an avconv equivalent to use scale2ref like this?
Daniel Jacob Archer
- 69
- 3
- 9